\(\bullet \)  We study the sum SE maximization for D2D links while guaranteeing the quality of service (QoS) of CUs. Efficient power control algorithms often play an important role in reducing cochannel interference and reaping the potential benefits of D2D communication. However, these algorithms are usually carried out based on the knowledge of instantaneous CSI of all links [1]}, [2]}, [3]}, [4]}. Apart from the computational complexity, such algorithms require BS to gather instantaneous CSI of all links, which is difficult for implementation. Therefore, in this paper, we consider performing the power control algorithm periodically at a coarser frame level granularity based on large-scale fading coefficients which vary slowly. Simulation results show that the proposed algorithm converges rapidly and obtains a much higher sum SE of D2D links compared to the typical orthogonal training scheme.
